I'm putting my new forged pistons on stock rods. For a goal of 300-350HP, is this dooming my build? Obviously anything can happen, but I've read people say "I've had stock rods to XXXHP for X years with no problem" and others piss on the idea of cast rods with any Turbo. Is this likely not an issue for me or is it really only a matter of time before they go?
They should be forged rods, not cast. Only three things will get the rod, lots of rpm, hammering them with detonation (at a level that would probably destroy the forged pistons), and an obscene level of boost making a lot more than 350HP.
Simple math, 350HP/6 = 58HP per rod. 58x8 = 464HP for an equivalent V8. Big block Buick's have factory forged rods and many are built with stock rods making in excess of 500-550HP, usually with a heavier piston on the end of the rod. You're not even close to pushing the limits of the stock rods (changing the bolts out wouldn't hurt though...), nor a 7 main supported crankshaft.
